The trade group SPRI, which represents the interests of sheet membrane and component suppliers to the commercial roofing industry, announced last Friday plans to revise ANSI/SPRI WD-1 “Wind Design Standard Practice for Roofing Assemblies” and canvass the document for re-approval as an American National Standard

In a July 5 news release, SPRI said that ANSI/SPRI WD-1 provides a methodology based on rational analysis to enhance securement for wind uplift resistance of non-ballasted assemblies, single-ply, modified bitumen and built-up roofing system assemblies installed over any roof deck. 

The rational analysis will be based on tested assembly data compared to calculated wind loads to extrapolate enhancements for securement within appropriate roof areas. The proposed revision will prepare the document for adoption into the International Building Code, with references to Florida Roofing Application Standards (RAS) 117 & 137, which have already been adopted by the state of Florida.

Last revised and reaffirmed in 2020, SPRI developed the ANSI/SPRI WD-1 standard to reference the design, specification and installation of ballasted single-ply roofing systems. 

For more information, visit

Those wishing to participate in the canvassing process should contact SPRI at